Record Display for the EPA National Library Catalog

RECORD NUMBER: 11 OF 26

OLS Field Name OLS Field Data
Main Title Effect of Specimen Size, Shape, and Orientation on Dry Deposition to Galvanized Steel Surfaces.
Author Spence, J. W. ; Lipfert, F. W. ; Katz, S. ;
CORP Author Environmental Protection Agency, Research Triangle Park, NC. Atmospheric Research and Exposure Assessment Lab. ;Environmental Consultant, Northport, NY. ;ManTech Environmental Technology, Inc., Research Triangle Park, NC. ;State Univ. of New York at Buffalo.
Publisher 12 Apr 93
Year Published 1993
Report Number EPA/600/J-94/311;
Stock Number PB94-192788
Additional Subjects Corrosion products ; Air pollution effects(Materials) ; Deposition ; Galvanized materials ; Steels ; Dry methods ; Exposure ; Environmental transport ; Wind velocity ; Surface chemistry ; Environmental effects ; Atmospheric temperature ; Reprints ;
Holdings
Library Call Number Additional Info Location Last
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NTIS  PB94-192788 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 11/11/1994
Collation 11p
Abstract
An analysis is presented of the variability in chemical composition of soluble corrosion products on galvanized steel specimens exposed at Research Triangle Park, NC, in the absence of natural precipitation. The specimens varied in size, shape, orientation angle, and previous exposure history. The soluble corrosion products were assumed to represent the effects of dry deposition of airborne substances, which were deduced to include SO2, NOy (presumed HNO3), Cl(-) (presumably HCl), and Ca(+2) (presumably from coarse particles), based on statistical analysis of their variability in relation to atmospheric conditions. The most important specimen characteristic was previous exposure history. Deposition of gases was dependent upon surface conditions, wind speed, and temperature, and to a lesser extent orientation angle. Depositon of particles was dependent upon specimen surface orientation. Soluble zinc loss varied with Reynolds number to the -0.2 power even though Reynolds numbers based on average wind speeds were well below those classically expected to produce turbulent flow.